astrophysics

Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

n. The branch of astronomy that deals with the physics of stellar phenomena.

from Wiktionary, Creative Commons Attribution/Share-Alike License

n. The branch of astronomy or physics that deals with the physical properties of celestial bodies and with the interaction between matter and radiation in celestial bodies and in the space between them.

from the GNU version of the Collaborative International Dictionary of English

n. the concerned with the physical and chemical properties of celestial bodies.

n. The science treating of the physical characteristics of the stars and other heavenly bodies, their chemical constitution, light, heat, atmospheres, etc. It is a branch of astronomy.

[When coming] up with the Krell backstory and who they are, I sat down with some of the nation's best minds in astrophysics and planetary geology and A.I. and asked them -- based on what we know now -- what will a million years from now look like?